The Philosophical Magazine: Comprehending the Various Branches of Science, the Liberal and Fine Arts, Geology, Agriculture, Manufactures and Commerce, Volume 22Richard Taylor and Company, 1805 - Physics |
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Common terms and phrases
alburnum ammonia animal antient appears axis bark body branches buds cake caloric cause cerium colour considerable contains crystallized degree dicotyledon discovered disease disks distance earth effect elastic employed experiments fluid force formed gale give glass grain green sulphate heat herbaceous Humboldt hydrogen hydromis inches inclination islands kind Klaproth labour latitude lava leucites ligneous magnetic equator manner mass matrass matter means medullary sheath memoir Messrs metal mountains muriatic acid nature nitrate nitric acid observations obtained oxide of mercury oxygen palladium phænomena phænomenon Philosophical plants platina platina and mercury portion precipitate present produce quantity red oxide regard schorls seen ship shore Showery solution of platina species specific gravity strata substance sulphate of iron sulphurated oxide supposed surface tained tion toises trees tubes Van Diemen's Land velocity vessel vitrification volcanoes wedges weight wood wootz
Popular passages
Page 88 - RECOLLECTIONS of the BRITISH INSTITUTION for PROMOTING the FINE ARTS in the UNITED KINGDOM...
Page 95 - Bridge-row, in the parish of St. George, Hanover-square, in the county of Middlesex...
Page 98 - ... principle, and mentioning them favorably on his return, the Board, through its president, Sir John Sinclair, requested from Mr. Jefferson a model and a description. These were forwarded to England in 1798.
Page 87 - MP The following Resolutions were agreed to unanimously : I. — That before any measures are taken for carrying the plan into execution, a petition be presented to his Majesty, praying that he would be graciously pleased to grant a charter to the Institution. II. — That an outline of the plan be laid before the Right Honourable Mr.
Page 77 - ... by a two-fold motion, both the diurnal and the annual one, with both of which the descent of the body is to be compounded. The earth's motion of rotation, at the equator, is about seventeen miles in a minute, or two-sevenths of a mile in a second; but in the middle latitudes of Europe little more than the half of that, or little above half a quarter of a mile in a second : and if we compound this motion with that of the descending body, as in mechanics, this may cause the body to appear to descend...
Page 241 - ... by which means they immediately receded, and the vertical wedges were disengaged. It was observed, even in this small ship, that the block which was formed of horizontal wedges of nine degrees, came away much easier than those of seven, and the one of seven than that of five. In removing the aforesaid blocks by the power of the...
Page 317 - These vessels are always accompanied by spiral tubes, which do not appear to carry any liquid ; but there is another vessel which appears to take its origin from the leaf, and which descends down the internal bark, and contains the true or prepared sap. When the leaf has attained its proper growth, it seems to perform precisely the office of the cotyledon ; but being exposed to the air, and without the same means to acquire, or the substance to retain moisture, it is fed by the alburnous tubes and...
Page 242 - The horizontal wedges in this, and the other docks that were afterwards fitted by him, are of cast-iron, with an angle of about five degrees and a half, which, from repeated trials, are found equal to any pressure, having in no instance receded, and when required were easily removed. The vertical wedge is of wood, lined with a plate of wrought iron, half an inch thick. On the bottom of the dock, in the wake of each block, is a plate of iron three quarters of an inch thick, so that iron at all times...
Page 310 - Duhamel has remarked, and is evidently puzzled with the circumstance, that trees perspire more in the month of August, when the leaves are full grown, and when the annual shoots have ceased to elongate, than at any earlier period ; and we cannot suppose the powers of vegetation to be thus actively employed, but in the execution of some very important operation. Bulbous and tuberous roots are almost wholly generated after the leaves and stems of the plants to which they belong have attained their...
Page 73 - ... are now to consider what inferences respecting their probable origin may be drawn from this mass of information. And indeed we may safely conclude, as it has been inferred from the whole, by the philosophers best qualified to judge of the circumstances, as follow, viz. that the bodies in question have fallen on the surface of the earth ; but that they were not projected by any terrestrial volcanoes ; and that we have no right, from the known laws of nature, to suppose that they were formed in...